Ed H. Chi.
  <b>A Taxonomy of Visualization Techniques Using the Data State
  Reference Model</b>.
  In <i>Proceedings of InfoVis 2000</i>, pages 69-76, 2000.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Chi-2000-TVT.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Chi-2000-TVT.bib">(bibtex:
  Chi-2000-TVT)</A>.<br />